CN101806573B - Contact measuring device - Google Patents

Abstract

A contact measuring device, comprising a guide rail, a slide assembly arranged on the guide rail, and a measuring head fixed on the slide assembly, the gravity of the slide assembly provides measurement pressure, and the slide assembly also includes a first guide piece and is detachably connected to the The gravity adjustment assembly on one end, the side head is fixed on the other end of the first guide, the gravity adjustment assembly includes a screw on the first guide and is detachably connected to the screw Nuts with different weights can be prepared to change the weight of the gravity adjustment component to adjust the measurement pressure. The contact measuring device of the invention has the advantages of constant measuring pressure and avoiding vibration of the measuring head.

Description

contact measuring device

technical field

The invention relates to a measuring device, in particular to a contact measuring device.

Background technique

During workpiece processing, contact or non-contact measuring devices are usually used to measure the flatness and roughness of workpieces. The contact measuring device needs to apply a certain pressure on the surface of the workpiece to be measured, and the pressure applied to different workpieces is generally different. Common contact measuring devices mostly use the elastic force of the spring as the measurement pressure, but because the elastic force of the spring changes linearly with its deformation, it cannot provide a constant pressure during measurement, which may increase the measurement error.

A contact measuring device that uses the pressure of gas as the pressure required for measurement. Two driving cylinders for driving the measuring head are arranged side by side on the contact measuring device, and an air inlet and an exhaust port are respectively arranged at both ends of the driving cylinder to transport gas. This kind of contact measuring device can provide a relatively constant measuring pressure, and it is also convenient to change the measuring pressure, but because the gas with a certain pressure flows faster, when using this kind of contact measuring device, the air inlet of the driving cylinder There will be a lot of noise at the gas outlet and gas outlet, and the vortex of the gas may cause the probe to vibrate.

Contents of the invention

In view of the above situation, it is necessary to provide a contact measuring device that can provide relatively constant measuring pressure and avoid vibration of the measuring head.

A contact measuring device, comprising a guide rail, a slide assembly arranged on the guide rail, and a measuring head fixed on the slide assembly, the gravity of the slide assembly provides measurement pressure, and the slide assembly also includes a first guide piece and is detachably connected to the The gravity adjustment assembly on one end, the side head is fixed on the other end of the first guide, the gravity adjustment assembly includes a screw on the first guide and is detachably connected to the screw Nuts with different weights can be prepared to change the weight of the gravity adjustment component to adjust the measurement pressure.

A contact measuring device, comprising a guide rail, a slide assembly passing through the guide rail, and a measuring head fixed on the slide assembly, the slide assembly is also provided with a first guide piece and a gravity adjustment assembly, the first guide piece is fixed on the On the measuring head, the gravity adjustment assembly includes a connecting piece connected to the first guide piece and a counterweight detachably arranged on the connecting piece, the connecting piece is a weight rod, and the counterweight is a weight, Weights of different weight classes can be prepared to change the weight of the gravity adjustment component to adjust the measurement pressure.

The above-mentioned contact measuring device can change the weight of the gravity adjusting component by setting the detachable gravity adjusting component on the sliding component to adjust the pressure required for the measurement and ensure the accuracy of the measurement. In addition, the gravity adjustment assembly is fixed on the sliding assembly, so it will not cause vibration of the probe.

Description of drawings

FIG. 1 is an exploded perspective view of a contact measuring device according to Embodiment 1 of the present invention.

Fig. 2 is a perspective view of the sliding assembly shown in Fig. 1 .

Fig. 3 is a three-dimensional exploded view of the contact measuring device according to the second embodiment of the present invention.

Detailed ways

The contact measuring device provided by the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Please refer to FIG. 1 , a contact measuring device 100 provided by Embodiment 1 of the present invention includes a base 10 , a sensor 20 fixed on the base 10 , a first guide rail 30 and a second guide rail 40 , and the first guide rail 30 and the second guide rail 40 The sliding assembly 50 is slidably connected, the measuring head 60 and the measuring ruler 70 are fixedly connected with the sliding assembly 50 , and the casing 80 is covered on the base 10 .

The base 10 has a first base plate 11 , a second base plate 13 and a third base plate 15 vertically extending from two opposite edges of the first base plate 11 , and a fixing plate 17 protruding from a middle of a surface of the first base plate 11 . The middle part of the second base plate 13 is provided with a connecting head 131 for connecting with a CNC machine tool (not shown). A through hole 151 is opened on the third substrate 15 for the probe 60 to pass through. The fixing plate 17 is close to and perpendicular to the third base plate 15 .

The sensor 20 is fixed on the first substrate 11 close to the second substrate 13 and can be used to read the scale of the measuring ruler 70 .

The first guide rail 30 is a gas guide rail and is fixed on the fixing plate 17 . The first guide rail 30 is roughly a rectangular block, and a guide hole 31 is opened therethrough.

The second guide rail 40 is also a gas guide rail fixed on the fixed plate 17 , and the first guide rail 30 and the second guide rail 40 are located on opposite sides of the fixed plate 17 . A guide hole 41 is also formed through the second guide rail 40 , and the axis of the guide hole 41 is parallel to the axis of the guide hole 31 of the first guide rail 30 . The structure and weight of the first guide rail 30 and the second guide rail 40 are basically the same, so as to ensure that the left and right sides of the fixed plate 17 can balance the gravity when they are fixed on the fixed plate 17 . When the first guide rail 30 and the second guide rail 40 are manufactured, it cannot be guaranteed that the weights of the two are exactly the same, so an adjusting member 33 can be added to both to adjust the gravity balance of the two. In this embodiment, the adjusting member 33 is a screw, and for the convenience of adjustment, the adjusting member 33 is arranged on the outside of the first guide rail 30 and the second guide rail 40 .

Please refer to FIG. 2 at the same time, the sliding assembly 50 includes a first guide 51 and a second guide 52 arranged side by side, a first fixing member 53 and a second fixing 54 connecting the first guide 51 and the second guide 52, The fixing part 55 connected with the first fixing part 53 and the gravity adjustment assembly 56 detachably connected with the fixing part 55 .

The first guide member 51 is a cylinder, passing through the guide hole 31 of the first guide rail 30 , one end is connected to the first fixing member 53 , and the other end is connected to the second fixing member 54 . In order to reduce its own weight, the first guide member 51 adopts a hollow structure.

The second guide 52 is also a cylinder, passing through the guide hole 41 of the second guide rail 40, one end is connected with the first fixing member 53, the other end is connected with the second fixing member 54, and the second guide 52 is connected with the first guide. The pieces 51 are parallel. In order to reduce its own weight, the second guide member 52 also adopts a hollow structure.

The first fixing member 53 includes a body 531 , a baffle 533 and a screw 535 connecting the body 531 and the baffle 533 . Both ends of the body 531 are provided with a slot 5311, the ends of the first guide 51 and the second guide 52 are respectively locked in the two slots 5311 of the body 531, and the baffle 533 is fixed to the body 531 by screws 535 After the connection, the first guide piece 51 and the second guide piece 52 can be fixedly connected with the first fixing piece 53 . The locking groove 5311 is a V-shaped groove, which can prevent the first guide member 51 and the second guide member 52 from rotating after being matched with the baffle plate 533 .

The second fixing part 54 has the same structure as the first fixing part 53 , and also includes a body 541 , a baffle 543 and a screw 545 connecting the body 541 and the baffle 543 . Both ends of the main body 541 define a locking slot 5411 for respectively fixing the other ends of the first guide member 51 and the second guide member 52 . The locking groove 5411 is also a V-shaped groove, which can prevent the first guide member 51 and the second guide member 52 from rotating after cooperating with the baffle plate 543 .

The fixing member 55 includes a first fixing plate 551 and a second fixing plate 553 vertically extending from an edge of the first fixing plate 551 , the first fixing plate 551 is connected to the middle of the first fixing member 53 .

The gravity adjustment assembly 56 is detachably connected to the middle part of the second fastening plate 553 of the fastening member 55. In this embodiment, the gravity adjustment assembly 56 includes a screw 561 and a nut 563 screwed on the screw 561, which can prepare heavy weight Different nuts 563 are used to change the weight of the gravity adjustment assembly 56.

The measuring head 60 is fixed in the middle of the second fixing member 54 , and its end passes through the through hole 151 of the third substrate 15 of the base 10 to measure the external workpiece to be measured (not shown).

The measuring ruler 70 is fixed on the second fixing plate 553 of the fixing member 55 , is located at the free end of the second fixing plate 553 , and can extend between the sensors 20 for the sensor 20 to read the scale. The measuring ruler 70 can be connected to the second fastening plate 553 by sticking, screwing, etc. In order to reduce the weight, sticking is adopted in this embodiment.

The shell 80 can cover the outside of the base 10 to protect the various components fixed on the base 10 and prevent dust at the same time.

Because the first guide rail 30 and the second guide rail 40 need gravity balance, and the sliding assembly 50 also needs gravity balance, so the sliding assembly 50 adopts a symmetrical structure in this embodiment to ensure that the first guide member 51 and the guide hole 31 of the first guide rail 30 Coaxial, the second guide member 52 is coaxial with the guide hole 41 of the second guide rail 40 .

When using the contact measuring device 100 of Embodiment 1 of the present invention to measure a workpiece, the weight of the gravity adjustment assembly 56 can be adjusted first to provide measurement pressure, and then the first guide rail 30 and the second guide rail 40 are ventilated to promote the first guide member 51 And the second guide 52 is separated from the first guide rail 30 and the second guide rail 40, so as to avoid the first guide 51 and the second guide 52 to produce frictional force when sliding relative to the first guide rail 30 and the second guide rail 40, to ensure the measurement Accuracy.

The gravity of the sliding assembly 50 is used as the measuring pressure of the contact measuring device 100 , and the gravity adjusting assembly 56 is fixed on the sliding assembly 50 , so that vibration of the measuring head 60 can be avoided. In addition, the gravity adjustment assembly 56 is detachably connected with the sliding assembly 50, and the measurement pressure can be changed by changing the gravity of the gravity adjustment assembly 56, so it is more convenient to change the measurement pressure.

It can be understood that the gravity adjustment assembly 56 can also be arranged at any position of the first fixing member 53 or the second fixing member 54, and the number is not limited to one or two, and can also be multiple, but it is necessary to ensure the gravity of the sliding assembly 50 Balanced to avoid friction when the first guide member 51 and the second guide member 52 of the sliding assembly 50 move relative to the first guide rail 30 and the second guide rail 40 .

The gravity adjustment assembly 56 is not limited to the screw 561 and the nut 563, and can also be a combination of other connecting parts and counterweights with different weight levels, such as weight rods and weights. Of course, the connecting piece can also be directly fixed on the sliding assembly 50, and only the counterweight is detachably arranged.

In addition, only one guide rail may be used or the first guide rail 30 and the second guide rail 40 may be integrated, and two through holes are opened in parallel on the one or integrated guide rail, so that the first guide member 51 and the second guide member 52 Pass through the two through holes respectively.

The slide assembly 50 can also only have the first guide piece 51. At this time, the remaining components of the slide assembly 50 can be omitted, and the gravity adjustment assembly 56 and the measuring ruler 70 can be directly fixed on one end of the first guide piece 51, and the measuring head 60 is fixed on the other end of the first guide 51 . Correspondingly, the second guide rail 40 can be eliminated.

Of course, it is also possible to connect the sensor 20 with the sliding assembly 50 and fix the measuring ruler 70 on the base 10 , as long as one of the sensor 20 and the measuring ruler 70 can move with the sliding assembly 50 .

Please refer to FIG. 3 , the structure of the contact measuring device 200 of the second embodiment of the present invention is similar to that of the contact measuring device 100 of the first embodiment, the difference is that the gravity adjustment assembly 56' is directly arranged On the first fixing plate 551' of the part 55', the first fixing part 53' and the fixing part 55' are connected.

In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should be included in the scope of protection claimed by the present invention.

Claims (9)

1. A contact measuring device, comprising a guide rail, a slide assembly arranged on the guide rail, and a measuring head fixed on the slide assembly, the gravity of the slide assembly provides measurement pressure, characterized in that: the slide assembly includes The first guide and a gravity adjustment assembly detachably connected to one end thereof, the measuring head is fixed on the other end of the first guide, and the gravity adjustment assembly includes a gravity adjustment assembly arranged on the first guide The screw and the nut detachably connected with the screw can prepare nuts with different weights to change the weight of the gravity adjustment assembly to adjust the measurement pressure. 2. The contact measuring device according to claim 1, characterized in that: the contact measuring device further comprises a measuring ruler and a sensor, one of the measuring ruler and the sensor is fixedly connected to the sliding assembly. 3 . The contact measuring device according to claim 2 , wherein a detachable adjustment member is provided on the guide rail, and the adjustment member can balance the gravity of the guide rail. 4 . 4. The contact measuring device according to claim 1 or 3, characterized in that the guide rail is a gas guide rail. 5. A contact measuring device, comprising a guide rail, a slide assembly passing through the guide rail, and a measuring head fixed on the slide assembly, characterized in that: the slide assembly includes a first guide member and a gravity adjustment assembly, The first guide is fixed on the measuring head, the gravity adjustment assembly includes a connecting piece connected with the first guiding piece and a counterweight detachably arranged on the connecting piece, the connecting The part is a weight rod, and the counterweight part is a weight, and weights of different weight classes can be prepared to change the weight of the gravity adjustment assembly to adjust the measurement pressure. 6. The contact measuring device according to claim 5, characterized in that: the contact measuring device further comprises a measuring ruler and a sensor, one of the measuring ruler and the sensor is fixedly connected to the sliding assembly. the 7. The contact measuring device according to claim 5, characterized in that: the guide rail is a gas guide rail, the guide rail is slidably sleeved on the first guide member, and the connecting member and the measuring head are both Move with the first guide. 8. The contact measuring device according to claim 7, characterized in that: the sliding assembly further comprises a second guide arranged side by side with the first guide, and a second guide connecting the first guide and the second guide. The first fixing piece and the second fixing piece of the piece, the first fixing piece and the second fixing piece are arranged side by side, and there are two guide rails, one of which is slidingly sleeved on the first guiding piece, and the other sliding Sleeve on the second guide piece. 9. The contact measuring device according to claim 8, characterized in that: the sliding assembly further comprises a fixed piece connected to the first fixed piece, the measuring ruler and the connecting piece are fixed on the fixed piece On the piece, the measuring head is fixed on the second fixing piece. the

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